Hi, The current device firmware for GPSMAP 66 is version 2.10.
The GPS chipset latest firmware is 2.50 at the time of writing this post.
The GPS chipset firmware has nothing to do with the unit’s mapping or GUI.
The GPS chipset updates:
2.40: Improved overall GPS positional accuracy.
2.50: Improved GPS performance in Expedition mode.
https://imgur.com/a/sFD45JG
https://imgur.com/a/7msQE3j
None of you will see my posts for another three weeks. I’m probably wasting my time but anyway...
It still just crashes all the time in a manner that turns itself off, or requires you to pull the batteries out to reset it or it stays frozen on a screen.
Last night was the first time I took it in a car just to see a moving map. I had Dad driving for 20 minutes so I could play with it,
and didn’t see a map at all until we were home again. It froze at the “Loading Profiles” screen three times, and each time I had to pull the batteries out.
If it freezes while it’s making a beep sound, then that sound is continuous until you take the batteries out. Most annoying.
I have Garmin original SD Card with preloaded Topo Australia V6 map (no firmware hacking or pirated maps).
Yes it has micro USB, with enough potting compound surrounding it to suspect they could have fit mini USB,
Yes there is a PCB image circulating to suggest it does have a QFH antenna, no a QFH antenna is not a placebo.
It has qualities making it very suitable for GPS, such as circular polarisation, and inherent rejection of reflected signals
originating from below the horizon.
The display is larger, and more vivid, but the unit is larger, and feels larger in your hand. It may not be as comfortable to hold for long periods.
In my view, it’s a paperweight, at least until it has some work to it’s device software.
I’d by no means trust it to even maintain a track log for a long hike without just turning off, or freezing.
Cheers.